Not bad for a first time. There is indeed a lot to learn about smooth control settings on the mavic which makes it easier to get the cinematic look of your video. On the forum there is a much information about it. Also about post processing.
I am relatively new with flying the mavic, and I am still reading before I am a bit satisfied with my own settings and post proces. For instance I recently bought FCP and now looking for plugins.
Happy flying and keep posting your vids. There will hopefully a lot of members who will give you the feedback you are asking for.
Brewsky